books
- Light and Matter -- physics for students majoring in the life sciences
- Simple Nature -- physics for scientists and engineers, with a nontraditional order of topics
- Mechanics -- introductory mechanics for scientists and engineers, with a traditional order of topics
- Conceptual Physics
- Problems in Introductory Physics
- Fundamentals of Calculus
- Relativity for Poets
- Special Relativity
- General Relativity
- Fields and Circuits (work in progress)
open-source software
- Spotter - a program that lets students check their answers to math and science questions
- OpenGrade - software for teachers to keep track of grades
- When - an extremely simple personal calendar program, aimed at the Unix geek who wants something minimalistic